本文件适用于自然排烟和排热通风机（NSHEV）的设计和安装，对于单层建筑，通过屋顶和多层建筑，通过热浮力垂直排烟的空间。它也适用于在外墙上安装NSHEV的空间。 本文件包括设计透明层的表格和计算方法，以符合各种保护目标的要求。 本文件包括应用本文规定的设计规则和安装NSHEV时应考虑的信息和规定。

This document applies to the design and installation of natural smoke and heat exhaust ventilators (NSHEVs) for spaces from which smoke is extracted vertically by thermal buoyancy via the roof in the case of single-storey buildings and via the uppermost storey in the case of multi-storey buildings. It also applies to spaces in which NSHEVs are installed in external walls. This document includes tables and calculation methods for the design of clear layers in order to comply with the requirements of various protection objectives. This document includes information and provisions to be taken into account when applying the design rules set out herein and when installing NSHEVs.